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hissing or sucking

  1. Should my car be making a sorta hissing/sucking sound? (Maybe dv?)

    Hi guys! I've got a leon 2l tfsi sport (185bhp), when i'm accelerating with the window down theres a sorta hissing/sucking sound maybe, normal? Reading about how carp the standard diaphram dv's are i'm kinda thinking the dv maybe faulty! I have vag-com (no fault codes about boost atm tho)! I was...